Fossil fuels and green house gases which burn holes in the ozone layer of the atmosphere causing global warming
        
             
        
        
        
True
A diploid is a cell that contains two haploid sets of chromosomes
        
             
        
        
        
If you were to compute this, Angle C should be equal to 100°.
In a triangle, all angles sum up to 180°. 
In triangle ABC, where the m∠A =30° and m∠50°:
m∠A + m∠B + m∠C = 180°
30° + 50 + m∠C = 180°
80° + m∠C = 180°
m∠C = 180° - 80°
m∠C = 100°
The triangle should look like the picture attached. 
 
        
             
        
        
        
I'm pretty sure these include light availability, oxygen levels, water movement, salinity, density and pH. These conditions often vary from habitat to habitat and will either support or limit the life processes of the marine organisms living there.
Hopefully that's right.